Comparing DIY mini splits for 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2,...

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Comparing DIY mini splits for 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2, but the key choice is value above -15°F or Zone Air Hyper Heat, designed to heat down to -22°F. Choose the efficiency edge or more cold-weather reach.